Grinding-machine.



c. c. WARNER & E. 0 PAUL,

GRINDiNG MACHNE. APPLICATION FILED JAN. 22. (91:.

1,255,962 Patented Feb. 12, 1918.

mDeMfot J Q atlWw-rnar 1 c. c WARNER & E. [1.PAUL.

" GHINDlNG MACHINE.

APFLKCATION FILED 1104.22. I911.

1,53%,962. latentd Feb. 12, 1-918.

0. 0. WARNER & Efu. PAUL.

GRINDING MACHINE.

APPLICATION FILED JAN. 22. um.

Patented Feb.12,1918

I a m llrllllllilliflllllfldidIl/IIIIIII: (villi/I!!! I!!! rill/Ill!!!II4I4I1I Il/l IlIlIll/II'I'II I! I'll!!! entra n; snares resents I icant crewman-nan, nnnnn 1). PAUL; or navntanitt, IIIASSACIEIUB'B'ETfi.

1'0 alt whom it may] concern: Be it known that we, CARL C. Wanner: andEmma D. PAUL, citizens of the United States, residing at Haverhill, inthe county exact description chines designed for to this use.

claimed, the descriptive no The object of the invent-ion is to provide amachine of: this class having improved means for properlypresenting thesurface tob'e ground tothe grinding wheel so as to accurately impart thecorrect shape thereto and with this general object in View, theinvention resides in certain novel features of construction and: uniquecombinations of parts to befhereinafterful y described and atter beingsup plemented by the accompanying drawings which constitute apartco'fthisiapplication and in which: i Figure 1 is a side elevation ofthe iniproved machine;

FigiQ isfa longitudinal and 4 Figs. 3 and 4 are transverse sections-onthe lilanes of the lines 3 3 and 4-4 of Fig, V

In, the drawings above briefly described, the numeral 1 has reference toa horizontal base'plate which may be secured upon a bench, upon a table2-as shown in the d'r'awsection thereof;

,ings, or upon any other suitable support,

'saidnbase carrying atone end a bearing 3 l3. 4

in whose upper end the horizontal e grinding wheel 5 .lS rotatiablymounted. a V Formed integrally with the upper sideof-thebase lcand I thelike 8.

A extending in a directionv transverse of theshaft' 4, is a dove tailtrack 6 receiving slidably thereonv a can e adjusted upon said trackhyhand and thenlocked against furthermovement'bymeans of a setscrew orFormed integrally with {01; rigidly secured in any other suitable mannerto the car- Specification of Letters Patent.

Application filed January 22 mat eninnmemncnmn Patented lfiebl lm, 151189 1917. Scrialhlo. 143,738.

- riage 7 is a second dove-tail track: 9 which extends transversely ofsaid carriage and receives slidahly thereon a second carriage 10 whichis thus movable arallel with the axis of the grinding whee l 5. Theunder side of the carriage 10 is provided with a rack bar 11 receivedsliclablyin a slot 12 formed through the track 9, said barnieshing witha pinion 13 on the inner end of a shaft 14 which projects rotatably andslidably through a bore 15 formed through the front portion of the track6, said track being recessed at 15 to permit the pinion to move backandforth with the carriage 7 as the latteris adjusted. The outer end ofshaft 14 is provided with a' hand wheel 16 by means of which it may berotated to cause the pinion 13 and rack 11 to adjust equipped with avcrticaldovetail track 20' receiving thereon a vertically moving can.

be groundriagc 21 which carries the Work-to as will be described.

An archedmatrix support22 straddles the track 17 and rises from thecarriage 7,

said support having above the track 17 apair of seats to receivematrices 23 and24 which are held in place by screws or the 1ike'25 asshown clearly in Figs. 2 and 8. Each matrix is providedv yrith oneirregular edge as will be clear fr'oi'n Figs 3 audit is the til-inactionof these edges to move the carriage 18 along? the-track l7 and to shiftthe carriage'2l a. (mg the track 20 agains'tth'e tension of coiledsprings 26 and 27 respectively, thus causing the work carried by thecarriage 21 to move in the proper direction with respect to the wheel 5for impart in the necessary formation to said, work.

fiihe carriage 18- is provided with a roller QE'traVeIing-on theirregular edge of the i 23 while the correspondin edge of matrix 24receives thereon a rel er 29 on the lower end-0f carriage'Q-I so thatthese two carrlages are moved in the required manner against the tensionof their springs 26 and 27 respectively.

The springs in question may be mounted any preferred manner but theinner endsthereof preferably bear against abutmente 30 and 31 securedrespectively to the outer end of the carriage 18 and the upper end ofcarriage 21, the outer ends of said springs being received slidably intubular, housings 32 and 33 secured respectively to the true cs 17 and20, adjusting screws 34 and 35 being threaded through the outer ends ofsaid housings for varying the tension of the springs 26 and 27 asoccasion may require.

A bracket arm 36 is secured by screws or the like 37 to the carriageforwardly therefrom toward the grinding edge of the wheel 5, the outerend of said arm having a horizontally'extcnding split bearing 58receiving rotatablytherein the arbor 39 of a work holding head 40, saidhead being preferably in the form of a flat metal block flanged at itsends at 41 and having suitable stop pins 12 and clamps 43 for securingblades or The arbor 39 as shown extends parallel with the shaft 4 of thegrinding wheel 5 and may be locked against possible rotation bytightenin the set screw 45 of the split bearing 38. store tightening thescrew, however,

1 the arbor is temporarily locked against movement by means 116w to bedescribed.

A disk 46 is carried rigidly end of the bearing 38 and a threaded intoan opening in said disk, said screwpassing throu h an arcuate slot 48 ina second disk 49 w ich contacts with the other and is rigidly mounted onthe outer end of the arbor 39 so that after the head 40 has beenproperly adjusted, the parts may be locked in this position temporarilyby tightep'ing the screw 47, screw 15 being then tightened to lock thearbor against possible turning.

The head 40 is provided with two sets of stop JlDS 12 and clamps 43in'order that two b ades such. as el may be ground with-' out varyingthe position of the matrices '23 and 24, thus insuring that the twoblades be by the outer of exactly the same contour. This is highlyessential when grinding the blades of ma chines such as those used forturning heels,

since it is necessary that both blades of the right as well as the lefthand arbor be of the exact shape.

In operation, the blades to be 'groundare clamped upon the head 40 asdepicted clearly in Fi 2 and the carriage 7 is then fed orward y therequired amount to properly .10- cats the uppermost of said blades withre spect to the periphery of the grinding wheel 5. This havin been done,the set screw 8 of'the carriage is locked and the set screws 34 and 35are turned to place their respective springs .26 and 27 under therequired ten sion. The wheel 5 is now or previously set in motion andthe carriage 10 is fed along the tr'ack9 by means of the wheel 16 sothat the blade being ground is moved back and forth across the wheel 5.During this more 21' and extendsening the first blade.

the like a l in place.-

screw 47 1s shaped face,

the blade being ground as to cause the grinding wheel to impart therequired shape thereto. After the uppermost blade has been ground, thehead 10 is inverted by loosenin the screws 15 and 47 so. that the otherb ade may be sharpened while the matrices 23 and 24 remain in the samepositions in which they were placed while sharp- This insures that thecunvl-ature of both blades shall he symmetrica After sharpening, say apair of right hand blades in the manner above described, the matrices 23and 2 1 may be reversed and the machine will then be in condition tosharpen,

a pair of left hand blades, the operation being the same.

Screws 8 and 8 similar to the screw 8 are by preference provided inorder that the carriages 18 and 21 may-be locked against movement Sothat the machine may be employed for grinding straight surfaces whenrequired, it being understood that no matrices are then needed andconsequently, the springs 26 and 27 may be thrown out of action byloosening their respective screws 34 and 35.

From the foregoing, taken in connection with the accompanying drawings,it will be clear that although the invention is of rather simple andinexpensive nature, it willjbe highly efficient and durable. For thesereasons, the construction shown end described constitutes thepreferredform of the ma chine but it is to be understood that within thescope of thcinvention as claimed, numerous changes may be made withoutsacri ficing the principal advantages.

We claim:

1. A grinding grinding wheel, a horizontal track extendingin a directiontransverse of the axis of the wheel, a" carriage movable along saidtrack, a fixed matrix adjacent one end of said carriage and having anirre ilarly said carriage having as o e engaging said face, means forforcing said carriage along the track to retain the shoe and matrix inengagement, a vertical track carmachine comprising a,

ried by said carriage, a second carriage slidable along said verticaltrack and havincgat one end a shoe, 9. second matrixengage by said lastnamed shoe, means for retaining said last named shoe in contact withsaid matrix, a work holder carried by said second anatrix, yieldingmeans for eomeee base extending in a direction at right angles to theaxis of said Wheel, a carriage slideble along said track, a second trackcarried by and extending transversely of said carriage a second carriageslideble along seid'seeon track and carrying 21' third troeir extendingat right angles to the axis of the grinding wheel, a thu-d carriageslidable along said third track, a metrixsupport carried by-seiel fitstnamed oeniage, a, horizontal mefioix carried by said matrix eupfioifi'nand exteiiai- 1rd tmelt, said" a fourth and vertical carriage slidablesilong said fourth track and having at its iower end a shoe, 9, secondmatrix carried by said matrix support and receivin said second shoethereon, yielding means or so moving said fourth carriage as to retainits shoe in engagement with said second matrix, and a work holdercarried by said fourth carriage for holding the work iii-proper relationto the grinding wheel D grinding .nieohiiie comprising 2, grindingwheel, Wot-it holder support in-- surfaces as it is moved in the eludinga horizontal bearing, said support being movable across said Wheel,means for automatically moving said support. in re spect to the wheeltor grindin irregular rst named manner, an arbor." rotatably mounted insaid beefing and having a head, means for tooking sald arbor. againstrotation, and .meam3 sides of sai head.

4. A grinding machine for irregular surfaces comprising e grindingwheel, a car- .Iiege movable in a direction parallel withthe axieof saidwheel and sliclable toward end'ewey from the letter, a matrix for automati'caliy controlling the sliding movement of seicl'corrie 'e, anadditional carriage cerried by the ot er and slidebie vertically, anadditional matrix for controlling the sliding of said additionalcarriage, and a workholdel' carried by said additional carriage,

In testimony whereof we have hereunto set our henris in presence of twosubscribing Witnesses.

' CARL C. ELMER D. PAUL. Witnesses DANIEL J1 LINEH'AN, 'liIAR'H' E."i'owem.

for clamping a pair of blades to the opposite

